Wrapper for powder, granular, or similar substances



W J. w. CHALMERS 2,04152 WRAPPER FOR POWDER, GRANULAR, OR SIMILARSUBSTANCES Filed July so, 1954 Patented May 19, 1936 UNITED STATESPATENT OFFICE WRAPPER; FOR POWDER, GRANULAR, R SIMILAR SUBSTANCES JohnWalker Chalmers, Deptford, London,

England Application July 30, 1934, Serial No. 737,664 In Great BritainAugust 1, 1933 3 Claims.

struction that the contents of the wrapper are very apt to escapebetween the folds of the wrapper at theblock-end thereof, and it is anobject of the invention. to provide a wrapper which is secured for thepurpose of prevent'mg the contents from escaping from the block end ofthe wrapper.

The wrapper is preferably reinforced so that it may be usedeither as aninner container for insertion into a further wrapper, or as anindependent container by suitably closing the open end thereof.

According to the present invention there is provided a wrapper forpowder, granular or similar substances comprising a block ended wrapperhaving side folds which are secured together 95 (e. g., by adhesive) anda reinforcing member or members contained within the wrapper and securedthereto (e. g. by adhesive applied to the innermost side folds of thewrapper).

The invention will be more particularly dega scribed with reference tothe accompanying drawing, in which:-

Figure 1 shows a blank from which a wrapper constructed in accordancewith the invention is formed, and illustrates the position of the lines5 of adhesive used to secure the folds of the wrapper together, and tosecure the reinforcing member in position within the wrapper.

Figure 2 illustrates a stage in the folding of the blank about thereinforcing member.

0 Figure 3 illustrates a wrapper formed in accordance with theinvention, prior to the open end of the wrapper being closed.

Figure 4 illustrates a modified form of blank from which a wrapperconstructed in accordance 4, with the invention may be formed.

Figure 5 illustrates a stage in the folding operations when using ablank constructed in accordance with Figure 3.

Figure 6 shows a completely folded and secured 5 wrapper constructedfrom the blank illustrated 55 any suitable material, such for example,as transparent grease-proof or other paper, and is provided along itslongitudinal edges with lines of adhesive 2, which are arranged in closeproximity with the longitudinal edges of the wrapper blank as shown inFigure 1, and which may extend along the entire length of the blank inthe manner illustrated. In some instances, the blanks are severed from acontinuous web of wrap-ping material, and the adhesive is applied to theblanks before they are severed from the web. In such 0 cases, the linesof adhesive may terminate a short distance from the shorter edges of theblank in order that when the cutting apparatus operates to sever theblank from the web, the knives operate at that portion of the blankwhere there is tudinal folding lines l about which the side folds 20:

of the wrapper are folded.

In order to form the wrapper, a strip -5 of reinforcing material, whichmay for example comprise a cardboard strip, is folded into a U shape,and the blank I is then folded into a U 2'5 about the strip'5, so thatthe limbs of the U of the wrapper extend along the open sides of the Uformed by the strip 5. The narrow end folds 6 (see Figure 2) of thewrapper are then folded inwardly against the sides of the strips 5 and3b are caused toadhere to the strip by means of the adhesive lines 2 and3, as seen clearly in Figure 2.: The operation of folding inwardly thenarrow end folds 6 causes substantially trit angular portions 1 to beformed at the block end of the wrapper, and as the side folds 8 and 9 ofthe wrapper are folded into engagement with the reinforcing member 5,the triangular portions 1 become secured to the respective side folds 8and 9, as can be clearly seen from Figure 2. 40

When the side folds 8 and 9 are folded into engagement with each otherthe first folded side fold, for example, the fold 8 is caused to adhereto the reinforcing member 5 by both of the lines 2, 3 of adhesiveapplied to the wrapper, whilst the outer fold, for example the fold 9,is caused to adhere to the strip 5 by means of the line 3 of adhesiveapplied thereto, and to the previously folded side fold by means fo theline 2 of adhesive. The container when folded in the manner justdescribed has the appearance illustrated in Figure 3, and the lines ofadhesive 2 and 3 are arranged as shown in this figure.

From Figure 3 it will be seen that the adhesive occurs at each point atwhich it would be possible, due to the folds of the wrapper, for any ofthe contents of the container to escape, but owing to the fact that thewrapper is secured along the whole length of the wrapper to the strip 5and also that adhesive is placed between each folded portion of thewrapper at the block end thereof, it is impossible for any of thecontents of the container to escape from the block end of the container.

Referring to the modified form of the invention illustrated in Figures 4and 5, the blank I is again provided with lines of adhesive 2, but inthe place of the longitudinal lines of adhesive 3, transverse lines ofadhesive II] are provided as shown in Figure 4, and the wrapper isfolded about the strip 5 in the manner previously described. The linesof adhesive IE] are arranged so that when the side folds 8 and 9 of thewrapper are folded into engagement with the reinforcing member 5 theportions l0 are secured thereto and securely hold the side folds of thewrapper together and prevent the escape of material from between them ina manner similar to that previously described.

Referring to Figure 6, it will be seen that the folds at the block endof the wrapper are securely held together and to the strip 5 so that itis impossible for the contents of the wrapper to escape from between thefolds at the block end of the wrapper.

It will be seen from the drawing that the strips 5 protrude slightlybeyond the open end of the wrapper, but this is only as a matter ofconvenience, and if desired, the strips may terminate either flush withthe open end of the wrapper, or if desired, slightly below the open endof the wrapper. The open end of the wrapper, as illustrated in Figure 3or 6, may, if desired, be folded down and secured in any suitablemanner, or if desired, the wrapper may be inserted into a furtherwrapper or wrappers and the open end interfolded with said other wrapperor wrappers in order to obtain a completely closed wrapper, the contentsof which cannot escape from either end of the wrapper.

It will be appreciated that instead of using a single strip of material5 for the reinforcing member as above described, two shorter portions ofreinforcing material may be utilized, each portion being of a lengthsubstantially equal to the length of the limbs of the U of thereinforcing member illustrated in the drawing and the base portion ofthe U as illustrated may be dispensed with. It will be seen that byusing two strips of reinforcing material in this manner, the stripswould still be secured to the wrapper in the manner described, the onlydifference being that the base portion of the wrapper would not bereinforced.

What I claim as my invention and desire to secure by Letters Patent is:

1. A rectangular block-ended wrapper comprising a pair of side folds oneach of two opposed sides of the wrapper, end folds at the block end ofthe Wrapper cooperating with the side folds, a reinforcing element foreach of said opposed sides, a line of adhesive adjacent eachlongitudinal edge of the wrapper on the inner side thereof, and at leastone line of adhesive applied to the inner side of the wrapper andadjacent the line about which each of said side folds is formed, themajor portion of that face of the wrapper to which the lines of adhesiveare applied being free from adhesive.

2. A rectangular block-ended wrapper comprising a pair of side folds oneach of two opposed sides of the wrapper, end folds at the block end ofthe wrapper cooperating with the side folds, a reinforcing element foreach of said opposed sides, and two pairs of substantially parallellines of adhesive applied to the inner side of the wrapper, one line ofeach pair being adjacent a longitudinal edge of the wrapper and theother line of each pair being adjacent the line about which each of saidside folds is formed, the major por tion of that face of the wrapper towhich the lines of adhesive are applied being free from adhesive.

3. A rectangular block-ended wrapper comprising a pair of side folds oneach of two opposed sides of the Wrapper, end folds at the block end ofthe wrapper cooperating with the side folds, a cardboardreinforcingelement for each of said opposed sides, said element consisting of astrip of comparatively rigid material the width of which issubstantially equal to the width of the side to be reinforced, a line ofadhesive adjacent each longitudinal edge of the wrapper on the innerside thereof, and at least one line of adhesive applied to the innerside of the wrapper and adjacent the line about which each of said sidefolds is formed, the major portion of that face of the wrapper to whichthe lines of adhesive are applied being free from adhesive.

JOHN WALKER CHALMERS.

